<template>
  <div>
    <!-- 商品分类导航 -->
    <div class="type-nav">
      <div class="container">
        <div @mouseleave="c1Index = -1">
          <h2 class="all">全部商品分类</h2>
          <div class="sort">
            <div class="all-sort-list2">
              <div
                class="item"
                @mouseenter="changeC1Index(index)"
                @click="searchC1()"
                v-for="(c1, index) in categoryList"
                :key="c1.categoryId"
                :class="c1Index == index ? 'c1-active' : ''"
              >
                <h3>
                  <a href="">{{ c1.categoryName }}</a>
                </h3>
                <!-- 二级、三级分类 -->
                <div
                  class="item-list clearfix"
                  :style="{ display: c1Index == index ? 'block' : 'none' }"
                >
                  <div
                    class="subitem"
                    v-for="c2 in c1.categoryChild"
                    :key="c2.categoryId"
                  >
                    <dl class="fore">
                      <dt>
                        <a href="">{{ c2.categoryName }}</a>
                      </dt>
                      <dd>
                        <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                          <a href="">{{ c3.categoryName }}</a>
                        </em>
                      </dd>
                    </dl>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>

        <nav class="nav">
          <a href="###">服装城</a>
          <a href="###">美妆馆</a>
          <a href="###">尚品汇超市</a>
          <a href="###">全球购</a>
          <a href="###">闪购</a>
          <a href="###">团购</a>
          <a href="###">有趣</a>
          <a href="###">秒杀</a>
        </nav>
      </div>
    </div>
  </div>
</template>

<script>
import { mapState } from "vuex";
import throttle from "lodash/throttle";

export default {
  name: "TypeNav",
  data() {
    return {
      c1Index: -1,
    };
  },
  methods: {
    // 被频繁的触发
    // changeC1Index() {
    //   this.c1Index = index;
    //   console.log("进入一级分类", index);
    // },
    changeC1Index: throttle(function (index) {
      this.c1Index = index;
      console.log("进入一级分类1", index);
    }, 50),
  },
  components: {},

  // 发起请求 获取商品分类数据
  mounted() {
    this.$store.dispatch("goodCategoryList");
  },
  computed: {
    ...mapState({
      categoryList: (state) => {
        return state.home.categoryList;
      },
    }),
  },
};
</script>

<style scoped lang='less'>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .c1-active {
    background: skyblue;
  }

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &:hover {
            /*             .item-list {
              display: block;
            } */
          }
        }
      }
    }
  }
}
</style>
